CN111255469B

CN111255469B - Modular disassembly construction method in closed narrow space of shield machine

Info

Publication number: CN111255469B
Application number: CN202010064739.4A
Authority: CN
Inventors: 刘亮; 刘�东; 岳春胜; 曹伟; 梁超; 陆跃; 赵星; 王圣涛; 栗诺; 孙虎; 吴涛; 张兵; 李彦兵
Original assignee: China Tiesiju Civil Engineering Group Co Ltd CTCE Group
Current assignee: China Tiesiju Civil Engineering Group Co Ltd CTCE Group
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2021-09-17
Anticipated expiration: 2040-01-20
Also published as: CN111255469A

Abstract

The invention discloses a modular disassembly construction method in a closed narrow space of a shield machine. The invention is suitable for the working condition that the receiving end of the shield tunnel has no reserved hoisting portal and does not have the condition that the shield machine is hoisted out, and the shield machine is moved back to the lower wellhead of the shield by the tunnel transport vehicle with all the components of the shield machine by the 'loop' to be hoisted out by placing all the components which are disassembled on the tunnel transport vehicle, thereby solving the technical problem and the safety problem of the disassembly construction of the shield machine in a closed narrow space and realizing the entry and exit of the shield machine at the same tunnel portal. The designed bending-resistant moment guide beam movable gantry crane for assisting the shield machine to be disassembled has the advantages that the winch on the gantry crane can move in the range of the transverse beam and the longitudinal beam, the hoisting range is wide, and the hoisting of all components of the shield machine can be met.

Description

Modular disassembly construction method in closed narrow space of shield machine

Technical Field

The invention relates to the field of shield construction, in particular to a modular disassembly construction method in a closed narrow space of a shield machine.

Background

With the development of cities, subways have become one of the main ways to relieve traffic pressure, and the construction of urban subways is also spread comprehensively. The shield machine is used as a modern underground engineering construction machine and plays an irreplaceable role in subway construction. As an indispensable link of shield construction, the disassembly operation of the shield machine after the tunneling task is completed has the characteristics of strong specialization, high risk, multiple limiting factors and the like.

As the size and the dead weight of the shield machine are larger, the shield machine is disassembled at home and abroad by the conventional method that the shield machine enters a reserved wellhead of a station, and is directly hoisted out of a well after a cutter head, a front shield, a middle shield and a tail shield 4 are disassembled. However, with the large-scale development of urban infrastructure, the construction is limited by a plurality of conditions such as large municipal pipelines, commercial compensation, traffic guidance and the like, and the construction period and the comprehensive cost are difficult to bear when an open cut station or a shield hoisting well is arranged in a part of special places, after the tunneling task is completed, the shield machine does not have the hoisting condition because the receiving end of the shield tunnel does not have a reserved wellhead and does not have the hoisting condition, and the shield machine does not have the hoisting condition after the tunneling task is completed.

Disclosure of Invention

The invention aims to solve the technical problem of providing a modular disassembly construction method in a shield machine closed narrow space, which is suitable for the working condition that a receiving end of a shield tunnel has no reserved hoisting hole and does not have the condition that the shield machine is hoisted out.

In order to solve the technical problems, the invention adopts the following technical scheme: the modular disassembly construction method in the closed narrow space of the shield machine comprises the following steps:

(1) shield machine disassembly preparation

Mounting a receiving base at a receiving end of the shield tunnel, and moving the shield machine into the receiving base;

the method comprises the following steps that an auxiliary bending-resistant guide beam movable gantry crane is installed at a receiving end of the shield tunnel, and the auxiliary bending-resistant guide beam movable gantry crane comprises a support frame, two cross beams, two longitudinal beams, two transverse traveling vehicles, two longitudinal traveling vehicles, a machine table and a winch; the support frame is fixed on the periphery of the shield machine, the two cross beams are fixed on the top of the support frame, the top of each cross beam is fixedly provided with a transverse walking vehicle track extending along the length direction of the cross beam, the two transverse walking vehicles are respectively arranged on the transverse walking vehicle tracks on the two cross beams, the two ends of each longitudinal beam are respectively fixed on the two transverse walking vehicles, the top of each longitudinal beam is fixedly provided with a longitudinal walking vehicle track extending along the length direction of the longitudinal beam, the two longitudinal walking vehicles are respectively arranged on the longitudinal walking vehicle tracks on the two longitudinal beams, the machine table is fixed on the two longitudinal walking vehicles, the winch is fixed on the machine table, and the two cross beams, the two longitudinal beams, the two transverse walking vehicles, the two longitudinal walking vehicles, The machine station and the winch are positioned above the shield machine;

(2) disassembly and transportation of rear matching trolley of shield machine

Sequentially detaching rear matched trolleys of the shield machine, placing the trolleys on a tunnel transport vehicle, transporting the trolleys to a shield lower wellhead by the tunnel transport vehicle, and finally hoisting the trolleys out of the shield lower wellhead by a crane;

(3) disintegration and transportation of spiral machine of shield machine

Detaching a screw machine of the shield tunneling machine, placing the screw machine on a tunnel transport vehicle, transporting the screw machine to a shield tunneling wellhead by the tunnel transport vehicle, and finally lifting the screw machine out of the shield tunneling wellhead by a crane;

(4) disassembly and transportation of segment erector of shield machine

The segment erector of the shield tunneling machine is disassembled, placed on a tunnel transport vehicle, transported to a shield lower wellhead by the tunnel transport vehicle, and finally lifted out by a crane outside the shield lower wellhead;

(5) disassembling and transporting shield tail of shield machine

Separating a shield tail of the shield tunneling machine from a middle shield, dividing the shield tail of the shield tunneling machine into a plurality of blocks, sequentially detaching each block of the shield tail of the shield tunneling machine, hoisting the blocks onto a tunnel transport vehicle through an auxiliary bending moment resistant guide beam movable gantry crane, transporting the blocks onto a shield lower wellhead by the tunnel transport vehicle, and hoisting the blocks out of the shield lower wellhead by a crane;

(6) disassembly and transportation of middle shield of shield machine

Separating a middle shield of the shield tunneling machine from a front shield and a man-machine compartment, dividing the middle shield of the shield tunneling machine into an upper part, a lower part and an internal connecting beam, sequentially detaching the upper part, the internal connecting beam and the lower part of the middle shield of the shield tunneling machine in sequence, hoisting the upper part, the internal connecting beam and the lower part of the middle shield of the shield tunneling machine to a tunnel transport vehicle through an auxiliary bending moment resistant guide beam movable gantry crane, transporting the upper part, the internal connecting beam and the lower part to a shield lower wellhead by the tunnel transport vehicle, and hoisting the upper part, the internal connecting beam and the lower part out of the shield lower wellhead by a crane;

then the man-machine room of the shield machine is disassembled, and is lifted to the tunnel transport vehicle by the bending-resistant guide beam movable gantry crane for assistance, and then the tunnel transport vehicle is transported to the shield lower wellhead, and is lifted out by a crane outside the shield lower wellhead;

(7) disassembling and transporting cutter head of shield machine

The method comprises the following steps of detaching a cutter head of the shield tunneling machine, hoisting the cutter head of the shield tunneling machine by an auxiliary bending-resistant guide beam movable gantry crane, horizontally placing the cutter head at a receiving end of a shield tunnel, dividing the cutter head of the shield tunneling machine into a plurality of cutter bodies, sequentially detaching the cutter bodies of the cutter head of the shield tunneling machine, hoisting the cutter bodies to a tunnel transport vehicle by the auxiliary bending-resistant guide beam movable gantry crane, transporting the cutter bodies to a shield lower wellhead by the tunnel transport vehicle, and hoisting the cutter bodies out of the shield lower wellhead by a crane;

(8) disassembly and transportation of front shield and main drive of shield machine

Firstly, detaching the upper part of a front shield of a shield machine, hoisting the front shield to a tunnel transport vehicle by an auxiliary bending-resistant guide beam movable gantry crane, transporting the front shield to a shield lower wellhead by the tunnel transport vehicle, and hoisting the front shield out of the shield lower wellhead by a crane;

then the main drive of the shield machine is dismounted, the main drive of the shield machine is turned over and placed on a tunnel transport vehicle in a horizontal state, the main drive is transported to the lower wellhead of the shield machine by the tunnel transport vehicle and then is hoisted out by a crane outside the lower wellhead of the shield machine;

and finally, the lower part of a front shield of the shield machine is lifted to a tunnel transport vehicle through a guide beam movable door for assistance, and is conveyed to the lower wellhead of the shield machine by the tunnel transport vehicle and is lifted out by a crane outside the lower wellhead of the shield machine.

The invention has the beneficial effects that:

the invention is suitable for the working condition that the receiving end of the shield tunnel has no reserved hoisting portal and does not have the condition that the shield machine is hoisted out, and the shield machine is hoisted out at the lower wellhead by placing each disassembled component on the tunnel transport vehicle and driving each component to go back by the tunnel transport vehicle, thereby solving the technical problem and the safety problem of the disassembly construction of the shield machine in a closed narrow space and realizing the entry and exit of the shield machine at the same tunnel portal.

In addition, the invention designs the auxiliary bending-resistant guide beam movable gantry crane to assist the shield machine in disassembly, when in use, the hoisting rope is firstly connected to the component to be disassembled, then the component is hoisted to the tunnel transport vehicle by moving the hoisting machine, the hoisting machine on the component can move in the range of the transverse beam and the longitudinal beam, the hoisting range is wide, and the hoisting of all the components of the shield machine can be met.

In addition, the invention can realize the aims of quick disintegration and block transportation. The integrality of shield constructs quick-witted part has been guaranteed furthest, and the later stage can be resumeed fast, reduces and recovers remanufacturing cost.

Drawings

Fig. 1 is a schematic perspective view of a bending moment resistant guide beam mobile gantry crane for assistance according to an embodiment of the present invention.

Fig. 2 is a schematic front view of a bending moment resistant guide beam mobile gantry crane for assistance according to an embodiment of the present invention.

Fig. 3 is a schematic right-view structural diagram of the auxiliary bending-resistant guide beam mobile gantry crane according to an embodiment of the present invention.

Fig. 4 is a schematic top view of a bending moment resistant guide beam mobile gantry crane for assistance according to an embodiment of the present invention.

Fig. 5 is a schematic structural view of a fixed pulley block in the auxiliary bending-resistant guide beam mobile gantry crane according to an embodiment of the present invention.

Fig. 6 is a schematic structural view of a movable pulley block in the auxiliary bending-resistant guide beam mobile gantry crane according to an embodiment of the present invention.

FIG. 7 is a schematic structural diagram of a support leg of the bending moment resisting guide beam mobile gantry crane for assistance according to an embodiment of the present invention.

Fig. 8 is an installation schematic diagram of the hoisting turn-over tool used in the invention (omitting hoisting, turn-over lifting ropes and the first and second hoisting mechanisms).

Fig. 9 is a right side view of fig. 8 (first and second swing mechanisms are omitted).

Figure 10 is a schematic structural view of the lifting lug of figure 8.

Fig. 11 is a sectional view a-a in fig. 10.

Fig. 12 is a plan view schematically illustrating the first hanger plate of fig. 10.

Fig. 13 is a schematic structural view of the turning-over lifting lug in fig. 8.

Fig. 14 is a sectional view B-B in fig. 13.

Fig. 15 is a plan view schematically illustrating the second hanger plate of fig. 13.

FIG. 16 is a schematic illustration of the disassembly of the screw machine in one embodiment of the present invention.

FIG. 17 is a diagram illustrating segmentation of the tail shield according to an embodiment of the present invention.

Fig. 18 is a schematic view of the transportation of the upper part of the middle shield in an embodiment of the present invention.

Fig. 19 is a schematic view of the transportation of the cross beam of the middle shield in an embodiment of the present invention.

Fig. 20 is a schematic view of the transportation of the lower part of the middle shield in an embodiment of the present invention.

Fig. 21 is a schematic illustration of the transport of the rear companion trolley in one embodiment of the invention.

Fig. 22 is a schematic illustration of the turn-over process of the main drive in one embodiment of the present invention.

Fig. 23 is a schematic view of turning over of the cutter head in one embodiment of the invention.

FIG. 24 is a schematic illustration of the disassembly of the segment erector, in accordance with an embodiment of the present invention.

The components in the drawings are labeled as follows:

the lifting device comprises a support frame 11, support legs 111, support rods 112, limit bumps 113, a steel wire bracket 114, a stand 1111, a flange 1112, a reinforcing rib 1113, a cross beam 12, a transverse traveling car track 121, a longitudinal beam 13, a longitudinal traveling car track 131, a transverse traveling car 14, a longitudinal traveling car 15, a machine table 16, a winch 17, a car body c1, a driving roller c2, a driven roller c3, a motor c4, a driving sprocket c5, a driven sprocket c6, a driving chain c7, a fixed pulley block 18, a first bracket 181, a first support shaft 182, a fixed pulley 183, a first clapboard 184, a movable pulley block 19, a second bracket 191, a second support shaft 192, a movable pulley 193, a second clapboard 194, a third support shaft 195, a spacer 196, a hook 110 and a lifting rope 1101;

the lifting device comprises a lifting lug 21, a first connecting plate 211, a first lifting plate 212, a first reinforcing rod 213, a first bolt 214, a first clamping groove 215, a lifting hole 216, a turnover lifting lug 22, a second connecting plate 221, a second lifting plate 222, a second reinforcing rod 223, a second bolt 224, a second clamping groove 225, a turnover lifting hole 226, a lifting sling 23, a turnover sling 24, a main drive 25 and a flange 251 of the main drive;

the device comprises a fixed hoisting frame 31, a movable hoisting frame 32, a screw machine 33, a tunnel transport vehicle 4, a tail shield 51, an upper part 52 of a middle shield, a beam 53 shaped like a Chinese character 'mi' of the middle shield, a lower part 54 of the middle shield, a rear matching trolley 61, a traction battery car 62, a cutter head 7, a heavy-load transport vehicle 81, a support 82 and a segment erector 83.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, "a plurality" means two or more. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention relates to a modular disassembly construction method in a closed narrow space of a shield tunneling machine, which comprises the following steps:

(1) shield machine disassembly preparation

1.1) installing a receiving base at a receiving end of a shield tunnel, and moving a shield machine into the receiving base;

in specific implementation, the receiving base can be prefabricated into roof trusses by steel structures and hung underground to be in place for assembly, the length of the receiving base is 11 meters, the shield tunneling machine can move back and forth on the base in the disassembly process, the shield tunneling machine assembles duct pieces, the duct pieces are pushed forward until the main machine part completely enters the receiving base and then stops, then a high-voltage cable of the shield tunneling machine is disconnected, and supporting facilities in tunnels such as water pipes, walkway plates and walkway plate supports which influence transportation are dismantled.

1.2) installing an auxiliary bending-resistant guide beam movable gantry crane at the receiving end of the shield tunnel, referring to fig. 1 to 4, wherein the gantry crane comprises a support frame 11, two cross beams 12, two longitudinal beams 13, two transverse traveling vehicles 14, two longitudinal traveling vehicles 15, a machine platform 16 and a winch 17; the supporting frame 11 is fixed on the periphery of the shield machine, the two cross beams 12 are fixed on the top of the supporting frame 11, the top of each cross beam 12 is fixed with a transverse traveling vehicle track 121 extending along the length direction of the cross beam 12, the two transverse traveling vehicles 14 are respectively installed on the transverse traveling vehicle tracks 121 on the two cross beams 12, two ends of each longitudinal beam 13 are respectively fixed on the two transverse traveling vehicles 14, the top of each longitudinal beam 13 is fixed with a longitudinal traveling vehicle track 131 extending along the length direction of the longitudinal beam 13, the two longitudinal traveling vehicles 15 are respectively installed on the longitudinal traveling vehicle tracks 131 on the two longitudinal beams 13, the machine platform 16 is fixed on the two longitudinal traveling vehicles 15, the winch 17 is fixed on the machine platform 16, the two cross beams 12, the two longitudinal beams 13, the two longitudinal beams 131, The two transverse traveling vehicles 14, the two longitudinal traveling vehicles 15, the machine table 16, and the winch 17 are located above the shield machine.

(2) Disassembly and transportation of rear matching trolley of shield machine

preferably, the specific disassembly process of the rear matching trolley of the shield tunneling machine is as follows: jacking the rear matching trolley of the shield tunneling machine by using a plurality of jacks, moving the tunnel transport vehicle to the position below the rear matching trolley of the shield tunneling machine, and then dropping the jacks back to place the rear matching trolley of the shield tunneling machine on the tunnel transport vehicle. By doing so, the rear supporting trolley can be detached and carried to the tunnel transport vehicle smoothly.

In specific implementation, after the shield tunneling machine receives the propulsion in place, the connection between the rear matched trolleys is removed, and loading and transportation of the connecting bridge and the rear matched trolleys are carried out. The platform truck uses four 50t mechanical jack synchronous jacking to jack up the platform truck respectively, utilizes 4 prefabricated frocks to place back supporting platform truck 61 on the flat board of traction battery car 62 to weld and consolidate, as shown in figure 21, outside 2# ~ 6# platform truck single section transportation output tunnel at every turn, 1# platform truck and equipment bridge are connected and are transported to the shield and shield shaft.

(3) Disintegration and transportation of spiral machine of shield machine

preferably, the specific disintegration process of the screw machine of the shield machine is as follows: a fixed hoisting frame 31 is fixedly installed on a segment erector, a slide rail parallel to a screw machine of a shield machine is installed on a tunnel transport vehicle, then two movable hoisting frames 32 are installed on the slide rail in a sliding way, a lifting lug is respectively installed on each of the fixed hoisting frame 31 and the two movable hoisting frames 32, one end of each of five lifting ropes is connected to a screw machine 33 of the shield machine, the other end of each of the five lifting ropes is respectively connected with five chain blocks, two lifting ropes penetrate through the lifting lug on one of the movable hoisting frames 32, the other two lifting ropes penetrate through the lifting lug on the other movable hoisting frame 32, the last lifting rope penetrates through the lifting lug on the fixed hoisting frame 31, finally the screw machine of the shield machine is dismounted, the screw machine of the shield machine is hoisted through each chain block, and the two movable hoisting frames move backwards, and pulling out the screw machine of the shield machine, and then releasing each chain block to place the screw machine of the shield machine on the tunnel transport vehicle. The operation is convenient to implement, and the screw machine can be stably and directly hoisted out and placed on the tunnel transport vehicle.

(4) Disassembly and transportation of segment erector of shield machine

in specific implementation, before the segment erector is disassembled, temporary sleepers and temporary rails are paved in the shield tail, and an attached assembling platform of the segment erector is disassembled to reduce the size of the segment erector during transportation as much as possible. After the assembly platform is disassembled, the heavy-duty transport vehicle 81 is placed below the segment erector, HW20 wide-wing section steel support 82 is used between the heavy-duty transport vehicle and a walking beam of the segment erector 83, as shown in figure 24, then the connection between the walking beam of the segment erector and other structural parts (generally connecting bolts with a cross beam) is disassembled, and finally the segment erector is pulled out of a tunnel by a battery car for hoisting.

(5) Disassembling and transporting shield tail of shield machine

in a specific implementation, the shield tail 41 is divided into four blocks, see fig. 17, and when the blocks are divided, an operator selects a proper position on the working platform according to the field situation to cut the blocks by using the gas cutting equipment.

(6) Disassembly and transportation of middle shield of shield machine

Separating the middle shield from the front shield and the man-machine compartment of the shield machine, then dividing the middle shield of the shield machine into an upper part 52, a lower part 54 and an internal connecting beam (the internal connecting beam is generally a beam 53 shaped like a Chinese character 'mi'), then sequentially detaching the upper part, the internal connecting beam and the lower part of the middle shield of the shield machine in sequence, and hoisting the middle shield of the shield machine to the tunnel transportation 4 by using a bending moment resistant guide beam movable gantry crane for assistance, referring to the figures 18 to 20, transporting the middle shield to the lower wellhead of the shield machine by a tunnel transportation vehicle, and hoisting the middle shield out of the lower wellhead of the shield machine by a crane;

in a specific implementation, the operation can be performed as follows:

6.1) removal of the upper part of the middle shield

Before separating the middle shield, jacking the front shield, the middle shield and the cutter head to the foremost end of the bracket, dismantling a connecting bolt of the middle shield, jacking the middle shield to the range of a reserved hoisting hole by using a hydraulic jack to hoist the upper part of the middle shield, jacking the upper part of the middle shield to the lower part of the reserved hole, welding lifting lugs on the upper part of the middle shield, wherein the transverse distance between the lifting lugs is 3334mm, and the longitudinal distance between the lifting lugs is 1250 mm;

and 4, hoisting four lifting lugs by using the main hook of the gantry crane, presetting 20% of weight of the upper part of the middle shield on the upper part of the centering shield by using the gantry crane, and straightening the steel wire rope. And (3) digging out V-shaped welding seams connected with the outer sides of the upper and lower blocks of the middle shield, dismantling connecting bolts at the upper and lower parts of the middle shield, and dismantling connecting bolts above the beam shaped like a Chinese character mi and the upper part of the middle shield. After the bolts are dismantled, the gantry crane continues to increase the lifting capacity to separate the upper shield from the lower shield.

And stopping lifting after the effective lifting height of the upper part of the middle shield from the beam shaped like the Chinese character mi is more than 300 mm. And pushing the lower part of the middle shield to the front shield by using a pump station jack. And reserving the maximum space for hoisting and rotating the upper part of the middle shield.

After the middle shield is pushed to the right position, the gantry crane slowly drops the hook, and four cable wind ropes with the diameter of 18mm are bound at four corners of the upper part of the middle shield. The cable wind rope applies certain pulling force to complete the rotation of the upper part of the centering shield by 90 degrees. After the rotation is completed, the heavy-duty transport vehicles pre-stored in the tunnel are transported out of the tunnel.

6.2) removal of the cross beam

The beam shaped like a Chinese character 'mi' can be disassembled after the hoisting and transportation of the upper part of the middle shield are finished.

Two lifting lugs are welded at the top of the beam shaped like a Chinese character 'mi', and a connecting bolt at the lower part of the beam shaped like a Chinese character 'mi' and the middle shield is disassembled. After the rice beam is lifted by the gantry crane, the lower part of the middle shield is pushed out of the hoisting range. And (4) hoisting the cross beam to a hoisting point below the cross beam by using a gantry crane auxiliary hook, turning over the cross beam by using a two-hook hoisting crane, loading and transporting the cross beam out of the tunnel.

6.3) lower part removal of the middle shield

After the hoisting and transportation of the beam shaped like the Chinese character 'mi' are finished, the lower part of the middle shield can be hoisted.

And moving the middle shield to the position of the reserved hoisting hole, installing a detachable lifting lug on the flange connection surface at the lower part of the middle shield, binding a cable rope at the lower part of the middle shield after the lower part of the middle shield is lifted by a gantry crane to a distance of more than 2200mm from the ground, and rotating the lower part of the middle shield by 90 degrees. And the rear gantry crane slowly drops the hook, and the lower part of the middle shield is placed on a heavy-duty transport vehicle to be transported out of the tunnel.

Finally, the man-machine room of the shield machine is detached, and is lifted to a tunnel transport vehicle through an auxiliary bending-resistant guide beam movable gantry crane, then is conveyed to the shield lower wellhead by the tunnel transport vehicle, and is lifted out by a crane outside the shield lower wellhead; in specific implementation, four lifting points positioned in the manned cabin are lifted by a door crane, connecting bolts of the manned cabin and a front shield are removed, and the manned cabin is lifted to an installation position and then loaded on a vehicle.

(7) Disassembling and transporting cutter head of shield machine

in specific implementation, the cutter head can be turned over by the aid of a bending-resistant moment guide beam movable gantry crane for assistance and by means of a preset hoisting point (2 10t chain blocks) of a middle plate of a station and the aid of the bending-resistant moment guide beam movable gantry crane for assistance. And the front shield and the cutter head are moved backwards to a middle plate reserved well mouth, and the front shield is close to the well mouth as far as possible. 2 lifting lugs are respectively welded at the upper part and the lower part of the cutter head, the cutter head is pulled by an auxiliary bending-resistant guide beam movable gantry crane, the cutter head and a main drive connecting bolt are loosened, the cutter head is lifted, and the cutter head is turned over and horizontally placed at the front part of the front shield by using an auxiliary lifting point of the middle plate, as shown in figure 23.

After the cutter head is placed on the receiving base steel plate, the flange face of the cutter head is welded with the steel plate section in a welding mode, a 10t chain block is used for moving forwards to provide a space for disassembling the front shield, and after the front shield is disassembled and transported out, the cutter head is hoisted to the flat car to be transported out.

And after the cutter disc is dismantled, the cutter disc is cut in blocks for facilitating transportation in the cutter disc hole. The cutter head block is divided into three blocks by taking a block dividing line as a reference, and the three blocks are respectively as follows: the center block, the large ring piece 1 and the large ring piece 2.

When the cutter head is disassembled, 4 positions of the large circular ring are required to be planed, the main beam pipe 4 position is required to be planed, firstly, the affected cutter is determined, and the cutter seat are planed; and removing the front welding cutter disc ring support. Firstly, welding a locator device and a connecting bolt at the position of the block. The locator device and the connecting bolt can ensure accurate location when the cutter head is restored and re-welded. The locator device is composed of connecting process blocks 1 and 2, a sleeve part 3 and a connecting bolt 4. And (4) sequentially planing and cutting the large ring cutting part and the main beam circular pipe to separate the periphery from the central block. And loosening the connecting bolts, taking the cutter head out of the hole according to three disassembled parts, and hoisting the cutter head to the transportation flat car by using the gantry crane and the middle plate auxiliary hoisting point.

8.1) firstly detaching the upper part of a front shield of the shield machine, lifting the front shield to a tunnel transport vehicle by using a bending-resistant beam guide movable gantry crane for assistance, conveying the front shield to a shield lower wellhead by the tunnel transport vehicle, and then lifting the front shield out of the shield lower wellhead by a crane;

in the specific implementation, the upper part of the anterior shield is dismantled basically in the same step as the upper part of the middle shield. However, it should be noted that the M60 stud connecting the main drive to the anterior shield is removed in a total of 33 turns about the midline before removing the upper portion of the anterior shield. Meanwhile, before hoisting, whether a pipeline arranged on the rear wall of the soil bin is completely disconnected or not and whether a bin door in front of the soil bin is closed or not need to be checked. And the upper part of the front shield can be hoisted after all the structural parts are completely dismantled and the pipelines are completely disconnected.

8.2) then detaching the main drive of the shield machine, turning the main drive of the shield machine to be placed on a tunnel transport vehicle in a horizontal state, transporting the main drive to a shield lower wellhead by the tunnel transport vehicle, and then hoisting the main drive out of the shield lower wellhead by a crane;

preferably, referring to fig. 8 and 9, the main drive of the shield tunneling machine adopts a hoisting turning-over tool to turn over to be in a horizontal state, wherein the hoisting turning-over tool comprises hoisting lifting lugs 21, turning-over lifting lugs 22, hoisting lifting ropes 23, turning-over lifting ropes 24, a first hoisting mechanism and a second hoisting mechanism; the turning-over lifting lug 21 is detachably fixed on the upper portion of a flange 251 of a main drive 25 of the shield machine, the turning-over lifting lug 22 is detachably fixed on the lower portion of the flange 251 of the main drive 25 of the shield machine, the lower end of the lifting rope 23 is connected to the lifting lug 21, the upper end of the lifting rope 23 is connected with the first lifting mechanism, the lower end of the turning-over lifting rope 24 is connected to the turning-over lifting lug 22, and the upper end of the turning-over lifting rope 24 is connected with the second lifting mechanism. When the shield tunnel lifting device is used, referring to figure 22, the lifting rope is slowly descended through the first lifting mechanism, the turnover lifting rope is slowly lifted through the second lifting mechanism, so that the upper part of the main drive falls and the lower part of the main drive rises, the main drive can be gradually overturned to be in a horizontal state, and then the main drive can be flatly placed on the tunnel transport vehicle to achieve the purpose of stable transportation.

The first and second hoisting mechanisms may use an electric hoist or a winch, or any other device capable of hoisting and lowering a hoist rope, which is well known to those skilled in the art, and therefore, are not shown in the drawings for the sake of brevity of description. Preferably, the bending-resistant guide beam movable gantry crane for assisting is used as the second hoisting mechanism, and the hoisting machine can move horizontally, so that the gantry crane can gradually move outwards along with the movement of the turning lifting lug in the turning process, and can more stably hoist and pull the main drive.

In specific implementation, the main driving system can be disassembled according to the following procedures: dismantling a main drive motor and a speed reducer → installing a main drive hoisting tool → dismantling a flange connecting bolt of the main drive and the lower half part of the front shield → hoisting the main drive to an installation position → pushing the lower half part of the front shield forward → installing a main drive turning tool → laying the main drive over → transporting the main drive. Before the main drive is disassembled, the main drive motor and the speed reducer are firstly disassembled, when the drive motor and the motor are disassembled, a single main drive hydraulic pump and the motor (small gears are not disassembled) are heavy by 3t, 5t of hanging belts are selected to be bound on the speed reducer, speed reducer flange mounting bolts are disassembled, the main drive motor and the speed reducer are lifted to mounting positions, and after 9 speed reducers are completely disassembled, the main drive motor and the speed reducer are loaded and transported outside a tunnel.

8.3) finally, the lower part of a front shield of the shield machine is lifted to a tunnel transport vehicle through a guide beam movable door for assistance, and the lower part is conveyed to a shield well opening by the tunnel transport vehicle and then lifted out by a crane outside the shield well opening.

The tunnel transport vehicle used in the invention can be any equipment capable of walking in the shield tunnel, such as a storage battery car, a plate car and the like commonly used in the existing shield construction, and the invention is not particularly limited as long as the parts disassembled correspondingly can be transported to the shield well opening from the receiving end of the shield tunnel.

In specific implementation, before the shield machine disassembly preparation, the shield machine may be subjected to disassembly and block design, simulation and calculation, for example:

a medium-speed railway earth pressure balanced shield machine is adopted in the Wansu district of No. 16 line of Beijing subway, and the shield machine is composed of a cutter head, a host machine and 7 sections of rear supporting trailers (including an equipment bridge). The front shield and the middle shield of the shield machine are designed in a sectional mode, when the shield machine is disassembled, the shield machine can be divided into two parts, transportation in a tunnel is facilitated, the blocks are connected through bolts, and rapid disassembly and recovery can be achieved. When the cutter head is disassembled in a station, the cutter head is disassembled into three parts, so that the three parts are convenient to transport in a tunnel, and the ground can be reassembled into an integral cutter head.

The structural size block size and weight parameter table of the shield tunneling machine is specifically shown in the following table 1:

TABLE 1 shield tunneling machine structure block size and weight parameter table

Before the shield machine is disassembled, the hoisting, the rotation, the spatial position relation with a station, the cutter turning, the screw machine dismantling and the like of the shield machine and the front shield during the disassembly are simulated, and the simulation calculation is carried out on the most unfavorable conditions of the flat transport vehicle in the tunnel. And simulating the shield body transportation process according to the shield body size and the tunnel section size, wherein the shield body transportation requirements of the flat car when passing through a turning radius of 350m are met.

And the lifting lugs, the steel wire ropes and the shackles which are used for disassembly, the stress of the station structure, the stability of the gantry crane and the like are calculated and analyzed, so that the requirements are met.

In specific implementation, the shield machine disassembly preparation work may further include encoding each component of the shield machine to facilitate assembly when used again, for example:

before disassembly, marking a mechanical structure, a wind system, a water system, a hydraulic system and an electrical system, marking according to each system during marking work, marking according to a uniform letter mark for each system, numbering at two ends of a pipeline joint the same, and marking each component of the shield tunneling machine by sequentially marking from back to front for each system;

in specific implementation, the shield tunneling machine disassembly preparation work may further include installing lifting lugs on the components of the shield tunneling machine to be lifted, so as to facilitate subsequent connection of lifting ropes for lifting, for example:

when the upper parts of the front shield body and the middle shield body are hoisted in a blocking mode, the welding type lifting lugs are used when the shield machine integrally leaves a factory. And the current and the welding method are controlled in the welding process, so that the welding quality is ensured. And flaw detection is carried out on the welding seam of the lifting lug after the welding is finished, and a qualified report of the welding of the lifting lug is issued.

When the lower parts of the front shield and the middle shield are hoisted in a blocking mode, detachable lifting lugs are used for being connected with shield body blocking flanges through bolts, and each lifting lug connecting bolt is 6 high-strength bolts of 10.9-grade M36. The lug mounting mode is connected as required in the drawing, and a torque wrench is used for carrying out torque re-tightening on the connecting bolt during the mounting of the detachable lug so as to ensure the reliable bolt connection.

The lifting lug and the turnover lifting lug are installed on the flange of the main drive, the lifting lug is formed by welding and assembling steel plates with the thickness of 60mm in a Q345B mode, the lifting lug is connected with the flange of the main drive through a high-strength bolt, after blanking is finished, burrs and burrs need to be removed, and a phi 90 lifting hole needs to be blunted.

Of course, the lifting lug is a basic component for lifting, the structure and the installation position of the lifting lug can be designed and selected according to specific actual requirements, the lifting lug belongs to the common knowledge in the field, and the invention is not limited in particular.

In an embodiment, referring to fig. 1 to 4, the two traverse traveling vehicles 14 and the two longitudinal traveling vehicles 15 have the same structure, and are respectively composed of a vehicle body c1, a driving mechanism, and a driving roller c2 and a driven roller c3 mounted at the bottom of the vehicle body c1, the driving roller c2 and the driven roller c3 are respectively in running fit with the corresponding transverse traveling vehicle track 121 or the corresponding longitudinal traveling vehicle track 131, the driving mechanism includes a motor c4, a driving sprocket c5, a driven sprocket c6 and a driving chain c7, the driving sprocket c5 is coaxially and fixedly connected with an output shaft of the motor c4, the driven sprocket c6 is coaxially and fixedly connected with the driving roller c2, and the driving chain c7 is engaged with the driving sprocket c5 and the driven sprocket c 6. The driving roller and the driven roller are used for walking on the walking vehicle track, the motor drives the driving chain wheel to rotate, then the driving chain wheel drives the driven chain wheel to rotate through the driving chain, and finally the driven chain wheel drives the driving roller to rotate, so that the driving roller can move on the walking vehicle track.

In one embodiment, two of the longitudinal carriages 15 share a single drive mechanism. The span between the two longitudinal beams does not need to be too large, so that the distance between the two longitudinal traveling vehicles is short, and too long torque is not needed, so that a pair of driving mechanisms is shared, the two longitudinal traveling vehicles can be stably driven, and the structure can be effectively simplified.

In an embodiment, referring to fig. 1 to 6, the hoisting device further includes a hoisting mechanism, the hoisting mechanism includes a fixed pulley block 18, a movable pulley block 19 and a hook 110, the fixed pulley block 18 includes a first bracket 181, a first support shaft 182 installed on the first bracket 181, and two or more fixed pulleys 183 rotatably installed on the first support shaft 182, any two adjacent fixed pulleys 183 are separated by a first partition 184 fixed on the first bracket 181 and penetrating through the first support shaft 182, the first bracket 181 is fixed on the machine platform 16, the movable pulley block 19 includes a second bracket 191, a second support shaft 192 installed on the second bracket 191, and two or more movable pulleys 193 rotatably installed on the second support shaft 192, and any two adjacent movable pulleys 193 are separated by a second partition 194 fixed on the second bracket 191 and penetrating through the second support shaft 192 The hook 110 is fixed at the bottom of the second bracket 191, when in use, one fixed pulley 183 and one movable pulley 193 form a group, one end of the lifting rope is fixed on the machine platform 16, and the other end of the lifting rope is wound around more than one fixed pulley 183 and one movable pulley 193 according to the rule that the lifting rope firstly winds around one fixed pulley 183 and then winds around one movable pulley 193 and then winds around the winch 17. The fixed pulley is with the guide lifting rope, the direction of conversion lifting rope, and the movable pulley is used for sharing the gravity of heavy object, saves lifting force, and design like this can reduce the lifting rope wearing and tearing, improves stability, reduces the power demand of hoist engine, and a plurality of fixed pulleys and a plurality of movable pulley separate and integrated together through the baffle, save space more, convenient to use.

In an embodiment, referring to fig. 6, the movable pulley block 19 further includes a third support shaft 195 installed on the second bracket 191 and located below the second support shaft 192 and passing through all the second partition plates 194, the movable pulley block 19 further includes spacers 196 rotatably sleeved on the third support shaft 195 by the same number as the number of the movable pulleys 193, each spacer 196 corresponds to each movable pulley 193 in a one-to-one manner, and two adjacent spacers 196 are separated by the corresponding second partition plate 194. By the design, the partition sleeve and the second partition plates on the two sides form a closed space, the lifting rope penetrates through the space and is wound on the movable pulley, the lifting rope can be prevented from being separated from the movable pulley, and therefore operation and use stability are improved.

In one embodiment, referring to fig. 1 to 3, two limiting protrusions 113 are respectively fixed to two top ends of the two cross beams 12 and two top ends of the two longitudinal beams 13. The limiting lug is used for limiting the transverse moving trolley and the longitudinal moving trolley and preventing the transverse moving trolley and the longitudinal moving trolley from falling off due to excessive displacement.

In one embodiment, referring to fig. 1, two cable brackets 114 are fixed to the outer sides of the two ends of the two beams 12, respectively. The bending-resistant guide beam movable gantry crane for assisting shield disassembly also needs to be hoisted during installation, and the arranged steel wire rope bracket is used for connecting a hoisting rope for hoisting.

In particular, any structural member to be hoisted may have a cable bracket 114 mounted thereon for connection to a cable.

In an embodiment, referring to fig. 1 to 4, the supporting frame 11 includes four supporting legs 111, two ends of one of the beams 12 are respectively fixed on top of two of the supporting legs 111, two ends of the other beam 12 are respectively fixed on top of the other two of the supporting legs 111, and two supporting rods 112 are respectively connected between two ends of the two beams 12. The support frame plays and supports the effect at a take the altitude with the crossbeam, and the bracing piece then plays the enhancement and makes whole device even become the effect of rectangular frame structure, designs like this, simple structure, and easy preparation is reliable and stable, and occupation space leans on the limit moreover, and the inside of the rectangular frame of formation just in time can hold the shield structure machine to each part after convenient handling shield structure machine disintegration.

In one embodiment, referring to fig. 1-3, the support leg 111 is formed by splicing two or more upright posts 1111. By the design, the supporting legs can be spliced by selecting the stand columns with different quantities as required, so that the height of the supporting legs can be adjusted, and different working condition requirements can be met.

In one embodiment, referring to fig. 7, a ring of flanges 1112 extends radially outward from each of the upper and lower ends of the upright 1111, the adjacent upright 1111 is spliced by fastening the corresponding flanges 1112 on the adjacent upright 1111 using bolts, and a reinforcing rib 1113 is fixed on the inner side of the flange 1112. Design like this, simple structure, easy dismouting, the strengthening rib plays the effect of strengthening the flange, prevents that the flange from warping and influencing the vertical degree of supporting leg.

In one embodiment, referring to fig. 9, the lifting lug 21 is provided with a lifting hole 216 for connecting the lifting rope 23, the turning-over lifting lug 22 is provided with a turning-over lifting hole 226 for connecting the turning-over lifting rope 24, the lifting hole 216 is located right above the flange 251 of the main drive 25, and the turning-over lifting hole 226 is horizontally staggered from the flange 251 of the main drive 25 and is located outside the flange 251 of the main drive 25. The lifting hole is located right above the flange of the main drive, the lifting gravity center is more stable, the turning-over lifting hole is staggered with the main drive, the turning-over lifting rope is not in contact with the main drive, the damage to the main drive can be effectively avoided, in addition, the lifting rope, the turning-over lifting rope and the main drive form a triangular shape, the structure is more stable, and therefore the stable motion of the main drive in the turning-over lifting process can be guaranteed.

In an embodiment, referring to fig. 10 to 12, the lifting lug 21 includes two first connection plates 211 and two first lifting plates 212, the two first lifting plates 212 are respectively provided with the lifting hanging hole 216, the two first connection plates 211 are respectively attached to the inner side surface and the outer side surface of the flange 251 of the main drive 25 and detachably fixed on the flange 251 of the main drive 25 by a plurality of first bolts 214 penetrating through the two first connection plates 211 and the flange 251 of the main drive 25, and the two first lifting plates 212 are welded to the tops of the two first connection plates 211 and perpendicular to the two first connection plates 211. Design like this, not only simple structure, easy to carry out is connected stably with the main drive moreover to two hoist and mount lifting eyes are connected hoist and mount lifting rope, and are more reliable and stable.

In an embodiment, referring to fig. 10 to 12, two first locking grooves 215 are formed at the bottom of each of the two first hanging plates 212, and the top of each of the two first connecting plates 211 is respectively locked in the two first locking grooves 215 of the first hanging plate 212. Design like this, can effectively increase the stability of being connected between first connecting plate and the first hanger plate, in the concrete implementation, can be fixed through welded mode interconnect between first connecting plate and the first hanger plate.

In one embodiment, referring to fig. 10 and 11, a first reinforcing rod 213 is connected between two first hanger plates 212. So as to increase the structural strength of the hoisting lug and prevent deformation.

In an embodiment, referring to fig. 13 to 15, the turning-over lifting lug 22 includes two second connection plates 221 and two second lifting plates 222, the two second lifting plates 222 are respectively provided with the turning-over lifting holes 226, the two second connection plates 221 are respectively attached to the inner side surface and the outer side surface of the flange 251 of the main drive 25 and detachably fixed on the flange 251 of the main drive 25 by a plurality of second bolts 224 penetrating through the two second connection plates 221 and the flange 251 of the main drive 25, and the two second lifting plates 222 are welded to the bottoms of the two second connection plates 221 and perpendicular to the two second connection plates 221. Similarly, the design is simple in structure and easy to implement, and the turnover lifting rope is stably connected with the main drive and connected with the two turnover lifting holes, so that the turnover lifting rope is more stable and reliable.

In an embodiment, referring to fig. 13 to 15, two second locking grooves 225 are formed at the bottom of each of the two second hanging plates 222, and the bottom of each of the two second connecting plates 221 is respectively locked in the two second locking grooves 225 of the second hanging plate 222. Similarly, the design can effectively increase the stability of connection between the second connecting plate and the second hanger plate, and in specific implementation, the second connecting plate and the second hanger plate can be connected and fixed with each other in a welding mode.

In one embodiment, referring to fig. 13 and 14, a second reinforcing bar 223 is connected between two second hanger plates 222. So as to increase the structural strength of the turnover lifting lug and prevent deformation.

Aiming at the technical problems that the shield machine cannot be normally disassembled without lifting out conditions in the closed narrow space of an underground excavated subway station, the construction method develops the bending moment resistant guide beam movable gantry crane which is arranged at the reserved hole of the middle plate of the station to assist the shield machine to be disassembled. The lifting lugs and steel wire ropes of various types are manufactured and welded to form a special lifting system for the disassembly of the modular shield machine, a safe and orderly shield disassembly method is discussed through theoretical calculation and working condition simulation, and the working efficiency and safety of the shield disassembly are guaranteed.

The construction method solves the technical problem and the safety problem of the shield machine disintegration construction in the closed narrow space, realizes the entry and exit of the shield machine at the same tunnel portal, and leads the shield machine to go back in a modular disintegration mode. Through deep research on the disassembly construction of the shield machine in the underground excavation station, not only is the requirement of a construction site, but also a lot of mechanical personnel and technical personnel for mastering advanced construction technology can be cultured, deep understanding on the shield machine is made, the advantages of manpower resources in group companies are formed, and powerful practical experience is provided for the group companies in the field.

The construction method solves the problem of disassembly and hoisting in the closed narrow disassembly space, ensures the safety of hoisting and transportation operation in the disassembly process, ensures the completeness of each part of the shield machine after disassembly to the maximum extent, ensures the work efficiency of disassembly after receiving, improves the construction progress, has remarkable economic and social benefits and innovativeness, and achieves the international leading level of the comprehensive technology.

It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and that various modifications or changes in light thereof will be suggested to persons skilled in the art and are to be included within the spirit and purview of this disclosure.

Claims

1. The modular disassembly construction method in the closed narrow space of the shield machine is characterized in that: the method comprises the following steps:

(1) shield machine disassembly preparation

(2) disassembly and transportation of rear matching trolley of shield machine

(3) disintegration and transportation of spiral machine of shield machine

the specific disintegration process of the screw machine of the shield machine is as follows: fixedly mounting a fixed hoisting frame on a segment erector, mounting a slide rail parallel to a screw machine of a shield machine on a tunnel transport vehicle, then slidably mounting two movable hoisting frames on the slide rail, respectively mounting a lifting lug on the fixed hoisting frame and the two movable hoisting frames, connecting one end of five lifting ropes to the screw machine of the shield machine, respectively connecting the other end of the five lifting ropes with five chain blocks, wherein two lifting ropes pass through the lifting lug on one of the movable hoisting frames, the other two lifting ropes pass through the lifting lug on the other movable hoisting frame, the last lifting rope passes through the lifting lug on the fixed hoisting frame, finally dismounting the screw machine of the shield machine, hoisting the screw machine of the shield machine through each chain block, and moving the two movable hoisting frames backwards, pulling out the screw machine of the shield machine, then releasing each chain block and placing the screw machine of the shield machine on a tunnel transport vehicle;

(4) disassembly and transportation of segment erector of shield machine

(5) disassembling and transporting shield tail of shield machine

(6) disassembly and transportation of middle shield of shield machine

(7) disassembling and transporting cutter head of shield machine

The method comprises the following steps of detaching a cutter head of the shield tunneling machine, lifting the cutter head of the shield tunneling machine through an auxiliary bending-resistant guide beam movable gantry crane, horizontally placing the cutter head at a receiving end of a shield tunnel, dividing the cutter head of the shield tunneling machine into a plurality of cutter bodies, sequentially detaching the cutter bodies of the cutter head of the shield tunneling machine, lifting the cutter bodies to a tunnel transport vehicle through the auxiliary bending-resistant guide beam movable gantry crane, conveying the cutter bodies to a lower well opening of the shield tunneling machine through the tunnel transport vehicle, and lifting the cutter bodies out of the lower well opening of the shield tunneling machine through a crane;

the main drive of the shield tunneling machine adopts a hoisting turnover tool to turn over to be in a horizontal state, wherein the hoisting turnover tool comprises a hoisting lifting lug, a turnover lifting lug, a hoisting lifting rope, a turnover lifting rope, a first lifting mechanism and a second lifting mechanism; the lifting lug is detachably fixed on the upper part of a flange of a main drive of the shield machine, the turnover lifting lug is detachably fixed on the lower part of the flange of the main drive of the shield machine, the lower end of the lifting rope is connected to the lifting lug, the upper end of the lifting rope is connected with the first lifting mechanism, the lower end of the turnover lifting rope is connected to the turnover lifting lug, and the upper end of the turnover lifting rope is connected with the second lifting mechanism;

the lifting lugs are provided with lifting holes for connecting the lifting ropes, the turning-over lifting lugs are provided with turning-over lifting holes for connecting the turning-over lifting ropes, the lifting holes are positioned right above the flanges of the main drive, and the turning-over lifting holes are mutually staggered with the flanges of the main drive in the horizontal direction and positioned outside the flanges of the main drive;

and finally, the lower part of a front shield of the shield machine is lifted to a tunnel transport vehicle by an auxiliary bending moment resistant guide beam movable gantry crane, conveyed to the lower wellhead of the shield machine by the tunnel transport vehicle and lifted out by a crane outside the lower wellhead of the shield machine.

2. The modular disassembly construction method of the shield tunneling machine in the closed narrow space as claimed in claim 1, characterized in that: the specific disintegration process of the rear matched trolley of the shield tunneling machine is as follows: jacking the rear matching trolley of the shield tunneling machine by using a plurality of jacks, moving the tunnel transport vehicle to the position below the rear matching trolley of the shield tunneling machine, and then dropping the jacks back to place the rear matching trolley of the shield tunneling machine on the tunnel transport vehicle.

3. The shield machine closed narrow space modular disassembly construction method of claim 1 or 2, characterized in that: the turnover lifting eye is provided with a turnover lifting hole for connecting the turnover lifting rope, the lifting hole is positioned right above a flange of a main drive, and the turnover lifting hole is staggered with the flange of the main drive in the horizontal direction and positioned outside the flange of the main drive.

4. The shield machine closed narrow space modular disassembly construction method of claim 1 or 2, characterized in that: in the bending-resistant guide beam movable gantry crane for assistance, the two transverse traveling vehicles and the two longitudinal traveling vehicles have the same structure and are respectively composed of a vehicle body, a driving mechanism, and a driving roller and a driven roller which are installed at the bottom of the vehicle body, the driving roller and the driven roller are respectively matched with the corresponding transverse traveling vehicle track or the corresponding longitudinal traveling vehicle track in a traveling mode, the driving mechanism comprises a motor, a driving chain wheel, a driven chain wheel and a driving chain, the driving chain wheel is coaxially and fixedly connected with an output shaft of the motor, the driven chain wheel is coaxially and fixedly connected with the driving roller, and the driving chain is meshed with the driving chain wheel and the driven chain wheel.

5. The shield machine closed narrow space modular disassembly construction method of claim 1 or 2, characterized in that: the auxiliary bending-resistant guide beam movable gantry crane further comprises a hoisting mechanism, the hoisting mechanism comprises a fixed pulley block, a movable pulley block and a lifting hook, the fixed pulley block comprises a first support, a first support shaft arranged on the first support and more than two fixed pulleys rotatably arranged on the first support shaft, any two adjacent fixed pulleys are separated by a first partition plate which is fixed on the first support and penetrates through the first support shaft, the first support is fixed on the machine table, the movable pulley block comprises a second support, a second support shaft arranged on the second support and more than two movable pulleys rotatably arranged on the second support shaft, and any two adjacent movable pulleys are separated by a second partition plate which is fixed on the second support and penetrates through the second support shaft, the lifting hook is fixed at the bottom of the second support, when the lifting hook is used, the fixed pulley and the movable pulley are combined into a group, one end of the lifting rope is fixed on the machine table, and the other end of the lifting rope is wound on the winch after being wound on the fixed pulley and the movable pulley according to the rule that the fixed pulley is wound on the fixed pulley and the movable pulley is wound on the movable pulley.

6. The modular disassembly construction method of the shield tunneling machine in the closed narrow space as claimed in claim 5, characterized in that: the movable pulley block further comprises a third support shaft which is arranged on the second support and located below the second support shaft and penetrates through all the second partition plates, the movable pulley block further comprises spacer bushes which are arranged on the third support shaft in a rotating mode and are the same in number with the movable pulleys, the spacer bushes are in one-to-one correspondence with the positions of the movable pulleys, and the two adjacent spacer bushes are separated by the corresponding second partition plates.

7. The shield machine closed narrow space modular disassembly construction method of claim 1 or 2, characterized in that: in the portable gantry crane of bending resistance nose girder for supplementary, the support frame includes four supporting legs, one of them both ends of crossbeam are fixed respectively wherein two the top of supporting leg, another one both ends of crossbeam are fixed respectively two the top of supporting leg, two spinal branch vaulting poles are connected respectively between two the both ends of crossbeam.

8. The shield machine closed narrow space modular disassembly construction method of claim 7, characterized in that: the supporting leg comprises the stand concatenation more than two sections, the upper and lower both ends of stand are radially outwards stretched out respectively and are had the round flange, adjacent two sections through using the bolt with adjacent two sections between the stand corresponding on the stand the flange fastening realizes the concatenation, the inboard of flange is fixed with the strengthening rib.